2.5 circles

The circles style plots a circle with an explicit radius at each data point. Three columns of data are required: x, y, radius. An optional 4th column may be used to specify color information. The radius is always interpreted in the units of the plot’s horizontal axis (x or x2). The scale on y and the aspect ratio of the plot are both ignored.

Example (draws circles whose area is proportional to the value in column 3):

    set style fill transparent solid 0.2 noborder
    plot 'data' using 1:2:(sqrt($3)) with circles, \
         'data' using 1:2 with linespoints

The result is similar to using a ‘points‘ plot with variable size points and pointstyle 6, except that the circles will scale with the x axis range. See also ‘set object circle‘ and ‘fillstyle‘.